Physical Review A - Atomic, Molecular, and Optical Physics
Doppler-free saturated absorption spectroscopy is performed on an enriched radioactive Ar39 sample. The spectrum of the 3s23p54s[3/2]2- 3s23p54p[5/2]3 cycling transition at 811.8 nm is recorded, and its isotope shift between Ar39 and Ar40 is derived. The hyperfine coupling constants A and B for both the 4s[3/2]2 and 4p[5/2]3 energy levels in Ar39 are also determined. The results partially disagree with a recently published measurement of the same transition. Based on earlier measurements as well as the current work, the isotope shift and hyperfine structure of the corresponding transition in Ar37 are also calculated. These spectroscopic data are essential for the realization of laser trapping and cooling of Ar37,39. © 2011 American Physical Society.
© 2011 American Physical Society
Williams, William; Lu, Z. T.; Rudinger, K.; Xu, C. Y.; Yokochi, R.; and Mueller, P., "Spectroscopic Study of the Cycling Transition 4s[3/2]2-4p[5/2] 3 at 811.8 nm in Ar39: Hyperfine Structure and Isotope Shift" (2011). Physics: Faculty Publications, Smith College, Northampton, MA.